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2002 Nissan Quest P0300 P0325 P1105 Misfire Diagnosis and Repair Guide

Model: 2002 Nissan Quest Fault Code: P0300 Posted: 2014-04-09 10:24

Our 2002 Nissan Quest has been displaying persistent misfire codes: P0300 (random/multiple cylinder misfire), P0325 (spark plug wire or ignition component failure), and P1105 (MAP/Baro Switch Solenoid Valve fault). The vehicle has been running poorly, especially after rain or humid conditions. We've already replaced the distributor cap, rotor, and spark plugs along with wires. Despite these repairs, the issue persists. Now we're considering replacing the distributor—however, before doing so, are there any other potential causes we should investigate? Any guidance on diagnosing or repairing P1105 specifically would be greatly appreciated.

Related fault codes
P0300P0325P1105
Comments (4)
Anonymous 2014-04-09 12:54

Start by inspecting the MAP/Baro Switch Solenoid Valve (P1105 code). Check all vacuum lines for cracks, loose connections, or leaks. Ensure proper vacuum pressure is maintained. Also verify 12 volts at the solenoid with the key off engine (KOEO) to confirm electrical integrity.

Anonymous 2014-04-10 08:20

The MAP sensor in a 2002 Nissan Quest can be either the BWD/Intermotor EGR Vacuum Solenoid (Part No. EGR3156) or the Hitachi Boost Sensor (PS64-0或). Both are mounted on firewall brackets and connected by one vacuum hose. The MAP sensor is typically located near the throttle body, where throttle cables exit the cover. Confirming the correct part helps in accurate diagnosis.

Anonymous 2014-04-10 13:43

The MAP/Baro Switch Solenoid is located at the throttle valve area—where the throttle cable exits the housing. It features a three-port vacuum valve with two wiring connections. For reference, search online: 'Manifold Absolute Pressure Sensor / Barometric Pressure Sensor switch solenoid 2002 Nissan Quest'.

Anonymous 2019-04-19 20:09

We've replaced the spark plugs and ignition wires, but the engine still runs poorly. The issue may not be solely ignition-related; the P1105 code suggests a vacuum or sensor fault that needs further investigation.